user manual pdf
Contents
1. X3 X3 7H 3 sour 1X5 8 Fig 3 standard connection of modules for parallel work with backup system N M where N modules quantity required to supply the load Ri M modules quantity required to provide power backup Page 6 EVA JETA1200 5 General device characteristics 1 Input voltage range 100 242 VAC 2 Input power frequency 47 440 Hz 3 Output power 2100 3600 W Um 100 176 VAC 3600 W Ui 176 242 VAC 4 Nominal output voltage and nominal output current defined by module type installed in the device 5 Output voltage adjustment by connecting external trimmer resistor included in package 30 10 gt 96 of output nominal voltage value 6 Instability of output voltage when changing input current from 10 to 100 96 omitting voltage drop at dividing diodes 2 7 Instability of output voltage when changing input device voltage 0 5 96 8 Output peak to peak voltage ripple at 20 MHz max 296 of output voltage 9 Output overcurrent protection 1 1 1 25 of nominal max output current followed by transition to current source mode 10 Max output capacity unlimited 11 Safe work in no load mode idle 12 Operating ambient temperature lt 10 450 C 13 Weight approx 30 kg 6 Caution 1 It s allowed to connect 1 2 or 3 modules however it s always necessary to connect the first module for all device functions to be active 2 It s strictly restricted to2. A Output voltage ripple mV The device is provided with a switchable sound notification system that reacts to a radiator temperature getting close to a critical value The device is set with following protections short circuit output over current output overvoltage and overheating The device has direct access to its modules and its output part to allow certain changes to connection of modules Modules JETA1200 used in the device are installed onto common heatsink which allows producing output power of 3600 W with no additional active air cooling at 30 C ambient temperature Page 3 EVA JETA1200 2 Package contents EVA JETA1200 3 230WS28 1 pcs Power cord 3 pcs Shorting blocks for output diodes 3 pcs Complementary part of service connector 3 pcs Jumpers for external feedback 6 pcs Measuring probe for output ripple 1 pcs Trimmer resistor 1 pcs Warranty certificate 1 pcs User manual 1 pcs Tab 1 package contents 3 Device description Front panel Fig 1 front device panel 1 Display of total output current 2 Switch to disable overheating sound notification 3 Display of output voltage for each module channel 4 Display of input parameters for each module channel input voltage input current input power power factor 5 Display of module s case temperature for each module channel 6 Input AC connector for each module
3. that output voltage adjustment range matches 30 10 of Uournom nominal output voltage When regulating output voltage load resistance must be constant Simultaneously power distribution should be monitored and its values shouldn t exceed those in table 3 Um VAC Power distribution at 70 UtN NoM at 110 Uinnom 230 6 5 Tab 3 power distribution at different input voltage Page 9 EVA JETA1200 FU1 JETA1200 aos Er Parai M E je Pr Four pass RS x3 X371 sour X5 8 2 JETA1200 FU2 SS ab xx Zren s S ro Four pst RS X3 X371 Tour x58 3 JETA1200 FU3 8 oy xs Pes G2 ERs bs par our e nu Rs hs LR our 1x36 ADJ Fig 4 modules connection scheme for adjusting device output voltage using the pin AD 10 Module connection for parallel work with one master module and application of external feedback connection When using backup system in master slave mode fig 5 external feedback output pins RS and RS following correct polarities of master module are connected directly to the load The rest of the modules slaves must have their RS and RS connected to their own OUT and OUT outputs respectively Page 10 EVA JETA1200 FU1 1 JETA1 200 aos eur Pero X3
4. 2r RS xs 5 our es Ems par Pour x58 FU2 E 1 k 2 JETA1200 aos xs Pera X3 2 FU3 3 JETA1200 aos sah Para Psar Rs Kss our Kasr ECT ouT X5 8 Fig 5 connection scheme for parallel work in master slave mode In such connection output device voltage would rise to equal to nominal output module voltage External feedback connection compensates for voltage drops at diodes and wire buses Output device voltage isn t dependent on output current Output modules voltages would rise by the value of voltage drop at diodes and wire buses and it would depend on output current Power distribution at different total load is shown in table 2 and should not exceed presented values Page 11 EVA JETA1200 11 Output power increase parallel work without dividing diodes In case when only output power increase is needed without backup system there is a possibility to use connection scheme shown in figure 6 For this mode dividing diodes must be shorted by copper shorting blocks included in package Power distribution at different total load is shown in table 2 and should not exceed presented values When using connection scheme from figure 6 it s important to check thoroughly all function modes which must be provided in equipment for stable work In terms of stable work connection scheme with dividing diodes is more appropriate
5. Page 12 EVA JETA1200 FU1 m JETA1200 FU2 L 3 2 JETA1200 FU3 3 JETA1200 Fig 6 increasing output power with parallel work without dividing diodes 12 Monitoring transients at common device output when connecting input power to modules inputs Monitoring transients at common device output may be done with connection scheme shown on fig 3 6 Page 13 EVA JETA1200 Connect oscilloscope in waiting mode to common output of modules connected in parallel At total output power of 30 100 of 2100 W at input voltage Ui 110 VAC and at total output power of 30 100 of 3600 W with input voltage Un 230 VAC record deviation of output common voltage Voltage deviation during transient must not be more than 5 of Uour Now During transient there should be no voltage drops or module restarts visible on oscilogram Transients time should not exceed 200 ms 13 Conclusion Other backup systems connections are possible Such connections would be specified by powering equipment and primary power sources In such cases it s necessary to consult module producer Page 14
6. User manual Demonstrational device for JETA series power supplies parallel work EVA JETA1200 15 09 2015 EVA JETA1200 Contents 1 Purpose and description of demonstrational device EVA JETA1200 3 2 Package contents 4 3 Device description 4 4 Standard JETA1200 modules connection in the device 5 5 General technical device parameters 7 6 Caution 7 7 First start 8 8 Check of output power distribution among modules 8 9 Common device output voltage adjustment using ADJ output pin 9 10 Modules connection for parallel work with one master module and application of external feedback connection 10 11 Output power increase parallel work without dividing diodes 12 12 Monitoring transients at common device output when connecting input power to modules inputs 13 13 Conclusion 14 Page2 EVA JETA1200 1 Purpose and description of demonstrational device EVA JETA1200 EVA JETA1200 3 230WS28 demonstrational device for parallel work of JETA series power supplies further referred to as the device is intended for familiarization with functioning of three AC DC power supplies modules JETA1200 230WS28 SCN with outputs connected in parallel Device allows to monitor following parameters of each module Input voltage value V Input current value A Input power value Power factor Output voltage value V Power supply case temperature C and also general device parameters e Output current
7. channel 7 Input fuse 15A 6 3 x 32 mm for each module channel Page 4 EVA JETA1200 Back panel Fig 2 back device panel 1 BNC 50 Ohm connector for output voltage ripple measurement 2 Common negative output M12x35 3 Common positive output M12x35 4 Standard JETA1200 modules connection in the device The device is delivered with JETA1200 modules connected standardly as shown on fig 3 Fuses FU1 FU2 FU3 are installed at inputs of JETA1200 modules separating diodes VD1 VD2 VD3 are installed at outputs to isolate defective module from the rest of modules in case of its failure Separating diodes type is Schottky diode with minimal forward voltage drop Schottky maximal reverse voltage is 1 5 2 times higher than nominal output module voltage Maximal forward diode current is at least twice as high as maximal output current of a single module External feedback is not used RS and RS are shorted to OUT and OUT of each module respectively For parallel work of three modules with common load pin PARAL is used In such connection output voltage of common device output would be lower than output voltages of each module because of voltage drops on separating diodes and output wire buses Page 5 EVA JETA1200 FU1 1 JETA1200 F I RS X x3 7H er besa 2 JETA1200 FU3 3 JETA1200 Bor pn Pa pea ERs h FE Four post RS
8. commutate output connections during operation 3 It s strictly restricted to connect and use the device where at least one of the modules has pins RS and RS unconnected 4 It s restricted to commutate modules in order to prevent contact burn by disconnecting power cord from power input connectors of the device 5 While testing when disconnecting any module from input power it s allowed to reconnect the module after at least 15 seconds Page 7 EVA JETA1200 6 Power delivered to resistive device load shouldn t be more than 5096 of load maximal power During tests it s necessary to provide adequate load air cooling to prevent load overheating 7 First start 1 Connect power cord of each device modules to input power or laboratory autotransformer 2 To switch between controllable parameters on input measuring display 4 fig 1 use button SEL 3 It must be made sure monitoring output voltage displays 3 fig 1 that output module voltages are equal specifically voltage differences are not higher than 196 of nominal output voltage 4 To measure output voltage ripple it s necessary to connect an oscilloscope cable that is a part of the package to BNC connector 1 fig 2 5 For modules pins functions refer to the original datasheet of module JETA1200 6 The device is provided with a preventive sound notification system in case of module over heating The system reacts to temperature of any module
9. s case exceeding 80 85 C If needed turn the switch 2 fig 1 on the front panel to OFF position to disable sound notification In case of overheating provide additional heatsink cooling for example by using ventilator s air flow 8 Check of output power distribution among modules 1 At input voltage Um 110 VAC and total output power of 3096 7096 100 of 2100 W perform measurements and record input currents of modules 2 At input voltage Ujn 230 VAC and total output power of 3096 7096 100 of 3600 W perform measurements and record input currents of modules 3 Calculate power distribution 96 at Uin 110 VAC and U 230 VAC using equation Pdis Iin max lin min lin max 100 where lin max is maximal and lin min is minimal values of input current of a particular module Page 8 EVA JETA1200 Power distributions with different total output loads should not exceed values in table 2 Um VAC Power distribution at Pour 30 at Pour 70 at Pour 100 Un 230 VAC 9 6 5 Umi 110 VAC 12 1 6 Tab 2 power distribution at different load 9 Common device output voltage adjustment using ADJ output pin To test output voltage adjustment function connection must be made according to fig 4 with using trimmer resistor Radj part of the package At input voltage Um 230 VAC and Pour 2500 W by regulating output trimmer resistor Rapj confirm
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